Assertion :Lower is the critical micelle concentration of a surfactant, more is its detergency. Reason: Sodium dodecanoate has higher CMC than sodium octanoate.
Choose the correct option.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect but Reason is correct
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Solution
The correct option is C Assertion is correct but Reason is incorrect
A surfactant with a low critical micelle concentration gives rise to a
washing solution of effective cleaning power, even at low concentrations of the detergent. Thus, the detergency is increased. Sodium dodecanoic has lower CMC than sodium octanoate.